Composite roofing



March 10, 1925. 1,529,463

J. 'R. BURNSIPE COMPOSITE ROOFING Filed June 22. 1923 WITNESSES INVENTOR J. 20 JRBurwwe.

2.5 ATTORNEYS Patented Mar. 10, 1925.

PATENT OFFICE.

JAMES ROBERT BURNSIDE, 0F TULSA, OKLAHOMA.

COMPOSITE ROOFING.

Application filed June 22, 1923. Serial No. 647,082.

To all whom it may concern:

Be it known that I, JAMES Ronnn'r BURN- SIDE, a citizen of the United States, and a resident of Tulsa, in the county of Tulsa and State of Oklahoma, have invented certain new and useful Improvements in Composite Roofings, of which the following is a specification.

This invention relates to an improvement in composite roofings which are adapted to be built up as they are laid to produce unitary and organized roofing structure that is strong, durable, waterproof and fireproof and comparatively light although embody ing in its structure non-corrosive metal as well as non-metallic elements.

Another object of the invention is to provide a rooting of this character having these advantages and capacities and which is at the same time adapted to be produced at comparatively slight expense since the materials of which it is composed are ordinarily available and since its application does not require the employment of ex traordinary skill or science.

Other objects and advantages of the invention reside in certain novel features of the construction, combination and arrangement of parts which will be hereinafter more full described and particularly pointed out in t e appended claims, reference being had to the accompanying drawings formingpart of this specification, and in which:

Figure 1 is a fragmentary perspective view illustrating the preferred embodiment of the invention;

Figure 2 is a view thereof in vertical section; and

Figure 3 is a view similar to Figure 2 but showing a slightly modified form of the invention.

Referring to the drawings wherein fo the sake of illustration is shown the preferred embodiment of the invention, the numeral 10 designates the under-structure of the roof. The roofing constituting the present invention is applled to this under-structure and comprises a dry sheet 11 of paper or felt which serves as the base or un der-sheet of the roofing and acts as a cushioning between the roofing and the under-structure of the roof. On the dry sheet 11 a layer or coating 12 of a mixture of asbestos and asphalt is applied and thoroughly spread so as to umformly cover the paper 11. A thin sheet of metallic lead or zinc 13 is next applied on the coating or -layer 12 and is in turn covered by a coat ing or layer 14 similar in composition to the layer 12. A sheet-of metallic lead or Z1110 15 is next applied onto the coating or layer 14 and onto the sheet 15 a final outer coating 17 of tar, pitch or asphalt is applied. The coating 17 may comprise elther tar, pitch or asphalt or a mixture of such substances with asbestos. Wherever a coating or layer is stated as comprising a mixture of tar, pitch or asphalt and asbestos the mixture is preferably made up of 30% asbestos and 70% asphalt, tar or pitch. It is to be understood also that while the invention is shown and described for the sake of simplicity in illustration as consisting simply of a plurality or series of superimposed sheets that in practice the sheets employed are overlapped laterally and longitudinally in the manner widely practiced in similar roofing or tarring. While lead is preferably employed as the material making up the metallic sheets 13 and 15" zinc may also be employed as indicated since both lead and zinc have substantially the same properties, both metals being pliant, malleable and substantially non-corrosive.

When the under-structure of the roof includes the. usual roofing boards, such'as shown in Figure 1 the dry sheet 11 of paper is preferably nailed to the .roof of.

boards but where this understructure. consists of concrete the dry sheet 11 of paper is cemented to the concrete by means of asphalt, pitch, tar or any other suitable substance.

- It will thus be seen that in the embodiment of the invention shown in Figure 1 the roofing structure consists in general of a base or under-sheet of paper or felt which acts as a cushion and alternate sheets of metal such as zinc or lead and adhesive waterproof and fireproof substance such as a mixture of asphalt, tar or itch and asbestos and an outer coating 0 asphalt, tar or pitch or a mixture of the same with asbestos as may be found desirable.

In the form of the invention shown in Figure 3 the roofing structure is in all respects like that disclosed in Figures 1 and 2 except that. the layers between the metallic sheets instead of consisting simply of a mixture of asphalt, tar or pitch and asbestos is of composite construction, being termediate sheet of building paper or roof-- oing paper or felt as shown in Figure 3 5 wherein the spaced-layers are designated as and "21 and intermediate sheets of paper are designated at 23. Ihall other respects the roofing structure shown in F igure 3w is like that shown in Figures 1 and 2, similar undersheet 25 as well as similar metallic sheets 26 and 27 and a similar outer c oating 28 being employed as before. It is to be understood that the asbestos tempers the tar, pitch and renders the same prac- 1/5 tically fireproof without impairing the water resisting propertiesof these substances nor detracting from their capacity for com- 'bining the elements of the roof into a unitary and organized structure. In this manila) ner a composite roofing structure is provided which is strong and durable as well as waterproof and weatherproof and which is comparatively inexpensive in that its application requires only ordinary skill and.

the use of ordinary roofing equipment and in that the elements of which it is composed' are widely manufactured and ordinarily available at a comparatively slight cost. It is to be understood that the asphalt, tar or pitch or the mixture of the same with asbestos are mopped on in the usual manner.

I claim:

1, A roof structure comprising a plurality of sheets of lead andlayers of adhesive between the sheets of lead.

of sheets of pliant and malleable non-corrosive metal andlayers of adhesive between the sheets of metal. A

3. A roof'structure comprisin a plurality of sheets of pliant and mallea le non-corrosive metal and layers of adhesive be;

JAMES ROBERT 'BURNSIDE.

. A roof structure comprising a plurality 

